126555920730 has 96 divisors (see below), whose sum is σ = 338259078144. Its totient is φ = 32804984448.

The previous prime is 126555920717. The next prime is 126555920779. The reversal of 126555920730 is 37029555621.

126555920730 is a `hidden beast` number, since 1 + 2 + 6 + 5 + 559 + 20 + 73 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3602229 + ... + 3637191.

It is an arithmetic number, because the mean of its divisors is an integer number (3523532064).

Almost surely, 2^126555920730 is an apocalyptic number.

126555920730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 126555920730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169129539072).

126555920730 is an abundant number, since it is smaller than the sum of its proper divisors (211703157414).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

126555920730 is a wasteful number, since it uses less digits than its factorization.

126555920730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36100 (or 36097 counting only the distinct ones).

The product of its (nonzero) digits is 567000, while the sum is 45.

The spelling of 126555920730 in words is "one hundred twenty-six billion, five hundred fifty-five million, nine hundred twenty thousand, seven hundred thirty".